HOW TO FIT A NEW QL KEYBOARD MEMBRANE.
Disconnect everything from the QL. Turn the QL upside down with the the Microdrives on the left. Unscrew the four short screws along the front edge, and the four long screws along the back.
Turn the QL over into the normal position. and carefully. lifting the front, open the case pivoting it against the back. It helps to have something like a few books to lean the opened top against before continuing.
Using both hands gently ease out the two membrane tags. Avoid disturbing the six LED wires which are locked into a connecter block. (If one or more become disconnected it is necessary to release them all by pulling up the body of the block. then reinserting them and pressing the block down again. The sequence of the leads from the back is- Red; Black: White: Black: Grey: Black. Each coloured lead has its own black lead which can be traced back to its LED.)
Once the tags have been released it is a good idea to fold the QL keyboard back so that it rests between the back edge of the QL base and a book about 2-3 ins thick, so that the keys to hang free.
The next step is to remove the QL keyboard alumimium backing plate. Gently peel away the old membrane tags from the double-sided tape. Mark the positions, then remove the six screws that fix the aluminium backing plate to the QL top. Remove the backing plate and then the membrane. The rubber bubble-mat should be flat, not pushed up by any of the keys. Make sure that it is located correctly on the six dowel pins.
Take the new membrane and locate it over the bubble-mat on the same six dowel pins. Replace the alumimium backing plate on the dowel pins. When the assembly is correctly positioned replace the six screws in the previously marked holes starting with the two centre ones.
Take the two membrane tags back up over the backing plate and secure them with double-sided tape, Do not bend them too sharply, and avoid creasing any part of the membrane.
Prop up the keyboard again in a vertical position. Take the larger membrane tag with the thumbs and fingers of both hands and carefully press it into the larger socket. Do not kink it, it should go in about 1/8in. Repeat the action with the other tag. (If necessary practice with the old membrane)
Lower the keyboard on to the base, and test the keys. If satisfactory replace the eight body screws.
Supplied by, | EEC LTD. 18-21 MISBOURNE HOUSE, CHILTERN HILL, CHALFONT ST PETER, | BUCKS. SL9 9UE. Tel 0753 888866. Fax 0753 887149.
THIS LEAFLET WAS PRODUCED USING A Sinclair QL AND QUILL. THE PRINTER USED WAS A MANNESMANN MT81 9-PIN PRICED £130 INC VAT.